FreeCalypso > hg > themwi-system-sw
annotate mgw/crcx.c @ 200:834656633fa0
sip-manual-out TFO: use is_hunt_fill mechanism
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 02 Apr 2023 17:44:23 -0800 |
parents | f062c32a5116 |
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rev | line source |
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1 /* |
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2 * In this module we implement our CRCX operation. |
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3 */ |
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4 |
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5 #include <sys/types.h> |
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6 #include <sys/socket.h> |
127
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7 #include <sys/time.h> |
32
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8 #include <netinet/in.h> |
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9 #include <arpa/inet.h> |
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10 #include <stdio.h> |
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11 #include <stdint.h> |
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12 #include <stdlib.h> |
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13 #include <string.h> |
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14 #include <strings.h> |
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15 #include <syslog.h> |
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16 #include <unistd.h> |
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17 #include "../include/tmgw_ctrl.h" |
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18 #include "../include/tmgw_const.h" |
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19 #include "struct.h" |
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20 #include "select.h" |
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21 |
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22 extern struct endpoint *find_ep_by_id(); |
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23 extern void udp_sink_rcvr(); |
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24 |
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25 extern struct bind_range_cfg bind_range_gsm, bind_range_pstn; |
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26 |
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27 static unsigned |
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28 get_new_ep_id(conn) |
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29 struct ctrl_conn *conn; |
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30 { |
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31 unsigned id; |
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32 |
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33 for (;;) { |
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34 id = conn->next_ep_id++; |
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35 if (!find_ep_by_id(conn, id)) |
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36 return id; |
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37 } |
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38 } |
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39 |
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40 static int |
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41 get_local_port_pair(ep, roe, brc) |
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42 struct endpoint *ep; |
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43 struct rtp_one_end *roe; |
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44 struct bind_range_cfg *brc; |
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45 { |
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46 struct sockaddr_in sin; |
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47 unsigned tries, rtp_port; |
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48 int rc; |
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49 |
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50 sin.sin_family = AF_INET; |
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51 sin.sin_addr = brc->bind_ip; |
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52 for (tries = brc->port_tries; tries; tries--) { |
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53 rtp_port = brc->port_next; |
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54 brc->port_next += 2; |
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55 if (brc->port_next >= brc->port_range_end) |
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56 brc->port_next = brc->port_range_start; |
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57 sin.sin_port = htons(rtp_port); |
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58 roe->rtp_fd = socket(AF_INET, SOCK_DGRAM, 0); |
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59 if (roe->rtp_fd < 0) { |
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60 syslog(LOG_CRIT, "socket(AF_INET, SOCK_DGRAM, 0): %m"); |
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61 return(-1); |
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62 } |
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63 rc = bind(roe->rtp_fd, (struct sockaddr *) &sin, sizeof sin); |
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64 if (rc < 0) { |
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65 close(roe->rtp_fd); |
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66 continue; |
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67 } |
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68 bcopy(&sin, &roe->bound_addr, sizeof(struct sockaddr_in)); |
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69 sin.sin_port = htons(rtp_port+1); |
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70 roe->rtcp_fd = socket(AF_INET, SOCK_DGRAM, 0); |
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71 if (roe->rtcp_fd < 0) { |
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72 syslog(LOG_CRIT, "socket(AF_INET, SOCK_DGRAM, 0): %m"); |
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73 close(roe->rtp_fd); |
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74 return(-1); |
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75 } |
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76 rc = bind(roe->rtcp_fd, (struct sockaddr *) &sin, sizeof sin); |
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77 if (rc < 0) { |
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78 close(roe->rtp_fd); |
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79 close(roe->rtcp_fd); |
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80 continue; |
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81 } |
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82 /* all good - make the file descriptors live for select */ |
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83 update_max_fd(roe->rtp_fd); |
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84 FD_SET(roe->rtp_fd, &select_for_read); |
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85 select_handlers[roe->rtp_fd] = udp_sink_rcvr; |
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86 select_data[roe->rtp_fd] = (void *) ep; |
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87 update_max_fd(roe->rtcp_fd); |
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88 FD_SET(roe->rtcp_fd, &select_for_read); |
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89 select_handlers[roe->rtcp_fd] = udp_sink_rcvr; |
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90 select_data[roe->rtcp_fd] = (void *) ep; |
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91 return(0); |
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92 } |
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93 /* couldn't find a free port pair */ |
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94 return(-1); |
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95 } |
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96 |
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97 void |
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98 process_crcx(conn, req, resp) |
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99 struct ctrl_conn *conn; |
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100 struct tmgw_ctrl_req *req; |
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101 struct tmgw_ctrl_resp *resp; |
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102 { |
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103 struct endpoint *ep; |
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104 int rc; |
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105 |
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106 /* ep_id in request encodes ep_type */ |
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107 switch (req->ep_id) { |
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108 case TMGW_EP_TYPE_DUMMY_GSM: |
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109 case TMGW_EP_TYPE_DUMMY_PSTN: |
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110 case TMGW_EP_TYPE_GATEWAY: |
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111 break; |
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112 default: |
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113 resp->res = TMGW_RESP_ERR_PARAM; |
32
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114 return; |
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115 } |
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116 ep = malloc(sizeof(struct endpoint)); |
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117 if (!ep) { |
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118 syslog(LOG_CRIT, "malloc for endpoint: %m"); |
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119 resp->res = TMGW_RESP_ERR_RSRC; |
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120 return; |
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121 } |
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122 bzero(ep, sizeof(struct endpoint)); |
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123 ep->ep_type = req->ep_id; |
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124 ep->ep_id = get_new_ep_id(conn); |
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125 if (ep->ep_type & TMGW_EP_HAS_GSM_SOCK) { |
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126 rc = get_local_port_pair(ep, &ep->rtp_gsm, &bind_range_gsm); |
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127 if (rc < 0) { |
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128 syslog(LOG_ERR, |
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129 "unable to get local port pair on GSM side"); |
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130 free(ep); |
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131 resp->res = TMGW_RESP_ERR_RSRC; |
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132 return; |
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133 } |
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134 } |
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135 if (ep->ep_type & TMGW_EP_HAS_PSTN_SOCK) { |
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136 rc = get_local_port_pair(ep, &ep->rtp_pstn, &bind_range_pstn); |
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137 if (rc < 0) { |
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138 syslog(LOG_ERR, |
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139 "unable to get local port pair on PSTN side"); |
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140 if (ep->ep_type & TMGW_EP_HAS_GSM_SOCK) |
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141 free_rtp_end(&ep->rtp_gsm); |
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142 free(ep); |
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143 resp->res = TMGW_RESP_ERR_RSRC; |
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144 return; |
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145 } |
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146 } |
99
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147 rc = mdcx_operation(ep, req); |
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148 if (rc != TMGW_RESP_OK) { |
32
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149 if (ep->ep_type & TMGW_EP_HAS_GSM_SOCK) |
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150 free_rtp_end(&ep->rtp_gsm); |
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151 if (ep->ep_type & TMGW_EP_HAS_PSTN_SOCK) |
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152 free_rtp_end(&ep->rtp_pstn); |
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153 free(ep); |
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154 resp->res = rc; |
32
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155 return; |
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156 } |
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157 /* all good - accept the new endpoint and return OK */ |
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158 ep->next = conn->endp_list; |
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159 conn->endp_list = ep; |
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160 resp->res = TMGW_RESP_OK; |
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161 resp->ep_id = ep->ep_id; |
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162 bcopy(&ep->rtp_gsm.bound_addr, &resp->gsm_addr, |
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163 sizeof(struct sockaddr_in)); |
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164 bcopy(&ep->rtp_pstn.bound_addr, &resp->pstn_addr, |
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165 sizeof(struct sockaddr_in)); |
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166 syslog(LOG_INFO, "CRCX endpoint type %u id %u", ep->ep_type, ep->ep_id); |
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parents:
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167 } |